Table 4.

Removal of the N-Ts and N-OMe groups.

Entry	Conditions	Results
1	Li, cat. naphthlene, −78 °C	debrominated products
2	Mg, MeOH, sonication	no reaction
3	Mg, MeOH, reflux	debrominated products
4	TBAF, THF	decomposition of 16
5	hv (254 nm), CH3CN	1 (trace) + decomposition of 16
6	hv (254 nm), dry THF	decomposition of 16
7	hv (254 nm), THF-H2O	decomposition of 16
8	SmI2 (8 equiv), THF, 0 °C to rt	1 (88% yield[a])

^[a]Isolated yield.